<template>
    <div class="add">
        <!-- 面包屑 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>添加商品</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card class="box-card">
            <!-- 提示区域 -->
            <el-alert
                center
                title="添加商品信息"
                type="info" show-icon :closable="false">
            </el-alert>
            <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
                <el-step title="基本信息"></el-step>
                <el-step title="商品参数"></el-step>
                <el-step title="商品属性"></el-step>
                <el-step title="商品图片"></el-step>
                <el-step title="商品内容"></el-step>
                <el-step title="完成"></el-step>
            </el-steps>
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
                <!-- Tabs 标签页 -->
                <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
                    <el-tab-pane label="基本信息" name="0">
                        <el-form-item label="商品名称:" prop="goods_name">
                            <el-input v-model="addForm.goods_name"></el-input>
                        </el-form-item>
                        <el-form-item label="商品价格:" prop="goods_price">
                            <el-input v-model="addForm.goods_price" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品重量:" prop="goods_weight">
                            <el-input v-model="addForm.goods_weight" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品数量:" prop="goods_number">
                            <el-input v-model="addForm.goods_number" type="number"></el-input>
                        </el-form-item>
                        <el-form-item label="商品分类:" prop="goods_cat">
                            <el-cascader
                            expand-trigger="hover"
                            v-model="addForm.goods_cat"
                            :options="catelist"
                            :props="cateProps"
                            @change="handleChange"></el-cascader>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品参数" name="1">
                        <!-- 渲染表单的item项 -->
                        <el-form-item :label="item.attr_name" v-for="(item,index) in manyTableData" :key="index">
                            <el-checkbox-group v-model="item.attr_vals">
                                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
                            </el-checkbox-group>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品属性" name="2">
                        <el-form-item :label="item.attr_name" v-for="(item,index) in onlyTableData" :key="index">
                            <el-input v-model="item.attr_vals"></el-input>
                        </el-form-item>
                    </el-tab-pane>
                    <el-tab-pane label="商品图片" name="3">
                        <!-- action	必选参数，图片上传到后台的api地址 -->
                        <el-upload
                        :action="uploadURL"
                        :on-preview="handlePreview"
                        :on-remove="handleRemove"
                        list-type="picture" :headers="headerObj" :on-success="handleSuccess">
                            <el-button size="small" type="primary">点击上传</el-button>
                            <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div>
                        </el-upload>
                    </el-tab-pane>
                    <el-tab-pane label="商品内容" name="4">
                        <!-- 富文本编辑器组件 -->
                        <quill-editor
                            ref="myQuillEditor"
                            v-model="addForm.goods_introduce"
                        />
                        <!-- 添加商品的按钮 -->
                        <el-button type="primary" class="btnadd" @click="add">添加商品</el-button>
                    </el-tab-pane>
                </el-tabs>
            </el-form>
        </el-card>
        <!-- 图片预览 -->
        <el-dialog
        title="图片预览"
        :visible.sync="previewVisible"
        width="50%">
            <img :src="previewPath" alt="" class="previewImg">
        </el-dialog>
    </div>
</template>

<script>
import { getCategories } from "network/categories.js";
import { getCategoriesAttributes } from "network/params.js";
import {postGoods} from "network/goods.js";
import _ from "lodash";
export default {
    data () {
        return {
            activeIndex:'0',
            // 添加商品的表单数据对象
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                // 商品分类所属的分类数组
                goods_cat:[],
                //图片的数组
                pics:[],
                // 商品的详情的描述字段
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[
                    { required: true, message: '请输入商品名称', trigger: 'blur' },
                ],
                goods_price:[
                    { required: true, message: '请输入商品价格', trigger: 'blur' },
                ],
                goods_weight:[
                    { required: true, message: '请输入商品重量', trigger: 'blur' },
                ],
                goods_number:[
                    { required: true, message: '请输入商品数量', trigger: 'blur' },
                ],
                goods_cat:[
                    { required: true, message: '请输入商品分类', trigger: 'blur' },
                ]
            },
            // 商品分类列表
            catelist:[],
            cateProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children',
                checkStrictly: true
            },
            // 动态参数列表数据
            manyTableData:[],
            // 静态参数列表数据
            onlyTableData:[],
            // 上传图片的URL地址
            uploadURL:'http://timemeetyou.com:8889/api/private/v1/upload',
            // 图片上传组件的headers请求头对象
            // 上传组件并没有调用axios   这里需要手动获取token
            headerObj:{
                Authorization:window.sessionStorage.getItem('token')
            },
            // 预览图片
            previewPath:'',
            previewVisible:false
        }
    },
    created () {
        this.getCateList();
    },
    methods: {
        // 获取所有商品分类数据
        getCateList(){
            getCategories().then(res=>{
                // console.log(res);
                this.catelist = res.data.data;
            })
        },
        // 级联选择器选中项变化,会触发这个函数
        handleChange(){
            // console.log(this.addForm.goods_cat)
            if(this.addForm.goods_cat.length != 3){
                this.addForm.goods_cat = []
            }
        },
        // 阻止tabs标签页
        beforeTabLeave(activeName, oldActiveName){
            // console.log("即将离开标签页名称" + activeName);
            // console.log("即将进入标签页名称" + oldActiveName);
            if( oldActiveName === '0' && this.addForm.goods_cat.length != 3){
                this.$message.error("请先选择商品分类");
                return false
            }
        },
        // tab 被选中时触发
        tabClicked(){
            if(this.activeIndex === "1"){
                // 动态属性
                getCategoriesAttributes(this.cateId,'many').then(res=>{
                    console.log(res.data.data);
                    res.data.data.forEach(item=>{
                        item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ');
                    })
                    this.manyTableData = res.data.data
                })
            }else if(this.activeIndex === "2"){
                // 静态属性
                getCategoriesAttributes(this.cateId,'only').then(res=>{
                    console.log(res);
                    this.onlyTableData = res.data.data;
                })
            }
        },
        // 处理图片预览效果
        handlePreview(file){
            console.log(file.response.data.url)
            this.previewPath = file.response.data.url;
            this.previewVisible = true;
        },
        // 移出图片的操作
        handleRemove(file){
            // 获取将要删除的图片的临时路径
            const fileData = file.response.data.tmp_path;
            // 从pics数组中,找到这个图片的对应索引值
            const i = this.addForm.pics.findIndex(x=>{
                console.log(x);// x就是数组的每一项
                x.pic === fileData
            })
            // 调用数组的splice方法,把图片信息对象,从pics数组中移出
            this.addForm.pics.splice(i,1)
            // console.log(this.addForm.pics)
        },
        //监听图片上传成功的事件
        handleSuccess(response){
            // console.log(response);
            // 1.拼接到一个图片信息对象
            const picInfo = {pic:response.data.tmp_path};
            // 2.将图片信息对象.push到pics数组中
            this.addForm.pics.push(picInfo);
            // console.log(this.addForm);
        },
        // 添加商品
        add(){
            this.$refs.addFormRef.validate(valid => {
                if(!valid){
                    return this.$message.error('请填写必要的表单项')
                }
                // 执行业务逻辑
                // 这里下载npm i lodash 依赖包,, cloneDeep(obj)
                // 这里的addForm.goods_cat保存需要试数组,提交文件需要为字符串,两者冲突,利用lodash,深拷贝出来一项
                const form = _.cloneDeep(this.addForm);
                form.goods_cat = form.goods_cat.join(',');
                
                // 处理动态参数
                this.manyTableData.forEach(item=>{
                    const newInfo = {
                        'attr_id':item.attr_id,
                        'attr_value':item.attr_vals.join(' ')
                    }
                    this.addForm.attrs.push(newInfo)
                })
                // 处理静态参数
                this.onlyTableData.forEach(item=>{
                    const newInfo = {
                        'attr_id':item.attr_id,
                        'attr_value':item.attr_vals
                    }
                    this.addForm.attrs.push(newInfo)
                })
                form.attrs = this.addForm.attrs;
                console.log(form)

                // const {data:res} = await this.$http.post('goods',form);
                // console.log(res)
                postGoods(form.goods_name,form.goods_price,form.goods_weight,form.goods_number,form.goods_cat,form.pics,form.goods_introduce,form.attrs).then(res=>{
                    // console.log(res)
                    // if(res.data.meta.status !== 201){
                    //     return this.$message.error("添加商品失败")
                    // }
                    this.$message.success("添加商品成功");
                    this.$router.push('/goods');
                })
            })
            
            
            
        }
    },
    computed: {
        cateId(){
            if(this.addForm.goods_cat.length === 3){
                return this.addForm.goods_cat[2]
            }
            return null;
        }
    }
}
</script>

<style lang="less" scoped>
.el-steps{
    margin: 15px 0;
}
.el-checkbox{
    margin: 0 5px 0 0 !important;
}
.previewImg{
    width: 100%;
}
.btnadd{
    margin-top: 15px;
}
</style>